142521089 has 2 divisors, whose sum is σ = 142521090. Its totient is φ = 142521088.

The previous prime is 142521083. The next prime is 142521091. The reversal of 142521089 is 980125241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107474689 + 35046400 = 10367^2 + 5920^2 .

It is a cyclic number.

It is not a de Polignac number, because 142521089 - 2¹⁶ = 142455553 is a prime.

Together with 142521091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142521083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71260544 + 71260545.

It is an arithmetic number, because the mean of its divisors is an integer number (71260545).

Almost surely, 2^142521089 is an apocalyptic number.

It is an amenable number.

142521089 is a deficient number, since it is larger than the sum of its proper divisors (1).

142521089 is an equidigital number, since it uses as much as digits as its factorization.

142521089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 142521089 is about 11938.2196746416. The cubic root of 142521089 is about 522.3477288019.

The spelling of 142521089 in words is "one hundred forty-two million, five hundred twenty-one thousand, eighty-nine".